Solve the system by the elimination method.
1 answer:
C. (-4,-⅔)
Step-by-step explanation:
Elimination Method:
R - 9S = 2
3R - 3S = -10
I'll solve for X first by eliminating S.
R - 9S = 2
-3(3R - 3S = -10)
R - 9S = 2
-9R + 9S = 30
(Add the equations)
-9R = 32
(Divide both sides by -9)
-9R/-5 = 32/-5
R = -4
Substitute the R value into either equation:
R - 9S = 2
(-4) - 9S = 2 (Add 4 to both sides of the equation)
+4 +4
-9S = 6 (Divide both sides of the equation by -9)
-9S/-9 = 6/-9
S = -6/9
Simplify
S = -2/3
Solution: (-4,-⅔)
Hope this helped
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